If the values of X,Y,Z are (0.52,0.56,0.43) for 07 days, then (0.09,0.15,0.17) for 25 days and (0.09,0.15,0.11) for 35 days. Then what are the values of X,Y,Z for day 66. Also please pin point the last day on which the values of X,Y,Z are positive and the day on which the values of X,Y,Z are equal to zero?

Need it fast and correct please